There is an ongoing discussion on a Gnome mailing list which points out that Gnome and KDE might collaborate for a new project: a FLOSS alternative to Dropbox.
The Gnome and KDE approach is more towards an collaboration tool, but which is very close to Dropbox. The DE independent FLOSS Dropbox alternative idea came because Google Summer of Code is approaching and both Gnome and KDE have a collaboration tool on their list.

It would be even cooler to get eyeOS2.0 working within ownCloud and allowing users to have full roaming Home folders hosted on their own server.

That would allow them to sit down at any Linux desktop machine and access their own user settings / configurations and files stored on the server (not all files would have to be, just synced ones) ... or fire up a web browser and navigate to their server to access and manipulate their synced docs, E-Mail, etc via eyeOS.